The Orange Box was worth the price of admission for Portal alone. The innovative gameplay was a breath of fresh air for the industry, leaving gamers and critics clamoring for more. The wait will soon be over, as Valve has confirmed Portal 2.

Kimberly Swift, lead designer for Portal, let the cat out of the bad on last night’s episode of X-Play on G4.

No time frame was set, but expect the sequel either later this year or early 2009.